ENTRY 20792 20230202 231320792 0 1 SUBENT 20792001 20230202 231320792 1 1 BIB 11 20 20792 1 2 TITLE Fission spectrum averaged cross section for the 20792 1 3 Th-232(n,f) reaction 20792 1 4 AUTHOR (K.Kobayashi) 20792 1 5 INSTITUTE (2JPNKTO) Kyoto university research reactor institute. 20792 1 6 REFERENCE (J,ANE,4,177,1977) Final publication. 20792 1 7 FACILITY (REAC,2JPNKTO) Beam port E-3 of KUR reactor. 20792 1 8 INC-SOURCE (REAC) 20792 1 9 INC-SPECT Fast neutron spectrum has been confirmed to 20792 1 10 be equivalent to that of 235U fission neutrons. 20792 1 11 MONITOR (28-NI-58(N,P)27-CO-58,,SIG,,FIS) 20792 1 12 ERR-ANALYS (ERR-T) Total error 20792 1 13 (ERR-1,,3.) Uncertainty in flux normalization 20792 1 14 (ERR-3,,3.5) other systematic errors 20792 1 15 STATUS (TABLE) Table 1 from Annals of Nucl.Energy,4(1977)177 20792 1 16 HISTORY (19781204C) PDJ. 20792 1 17 (19801112A) G.C. Monitor reaction string corrected. 20792 1 18 (20211220A) SD:Updated to new date formats,lower case. 20792 1 19 MONITOR reaction updated (-G+M from SF4 and /SUM from 20792 1 20 SF6 deleted). 20792 1 21 (20230202U) SD: Corrections in Subent 003. 20792 1 22 ENDBIB 20 0 20792 1 23 COMMON 1 3 20792 1 24 MONIT 20792 1 25 MB 20792 1 26 102. 20792 1 27 ENDCOMMON 3 0 20792 1 28 ENDSUBENT 27 0 20792 199999 SUBENT 20792002 20211220 230620792 2 1 BIB 9 21 20792 2 2 REACTION (90-TH-232(N,F),,SIG,,FIS) 20792 2 3 SAMPLE Thorium electrodeposited onto a stainless steel plate 20792 2 4 thickness 20 to 30 ug/cm2 from alpha monitoring. 20792 2 5 DETECTOR (FISCH) Fission chamber with a silicon detector 20792 2 6 (SI) silicon detector 20792 2 7 ANALYSIS Average cross section derived from combining 20792 2 8 the counting rates for fission fragments and decay 20792 2 9 alphas to eliminate detector efficiency. 20792 2 10 PART-DET (FF) Fission fragments. 20792 2 11 CORRECTION Anisotropy of fission fragment distributions 20792 2 12 corrected using Monte Carlo calculation and data 20792 2 13 from REFS (see REL-REF). 20792 2 14 REL-REF (M,,S.Lo Nigro+,J,NP/A,118,461,1968) 20792 2 15 (M,,S.Lo Nigro+,J,NP/A,96,617,1967) 20792 2 16 (M,,V.Emma+,J,NP/A,199,186,1973) 20792 2 17 (M,13709001,R.L.Henkel+,J,PR,103,1292,1956) 20792 2 18 resulting correction 14.17%. 20792 2 19 ERR-ANALYS (ERR-S,1.5,2.5) Statistical error 20792 2 20 (ERR-2) geometrical uncertainty 20792 2 21 HISTORY (19801112A) G.C., Data headings changed. 20792 2 22 (20211220U) SD: BIB updated. 20792 2 23 ENDBIB 21 0 20792 2 24 NOCOMMON 0 0 20792 2 25 DATA 4 1 20792 2 26 EN-DUMMY DATA ERR-T ERR-2 20792 2 27 MEV MB MB PER-CENT 20792 2 28 1.5 77.4 3.7 1.5 20792 2 29 ENDDATA 3 0 20792 2 30 ENDSUBENT 29 0 20792 299999 SUBENT 20792003 20230202 231320792 3 1 BIB 10 21 20792 3 2 REACTION (90-TH-232(N,F),,SIG,,FIS) 20792 3 3 SAMPLE Commercial thorium foils. Impurities checked by 20792 3 4 thermal neutrons contributed about 1.5% to 20792 3 5 Th fission cross section. 20792 3 6 METHOD (ACTIV) 20792 3 7 DETECTOR (PLATE) Fission plate irradiated simultaneously 20792 3 8 with monitor 20792 3 9 (GELI) induced activity detected with GeLi detector. 20792 3 10 30cc calibrated with standard sources. 20792 3 11 Activities of 140-La and 140-Ba were measured. 20792 3 12 ASSUMED (ASSUM,90-TH-232(N,F)56-BA-140,CUM,FY) 20792 3 13 REL-REF (R,,M.E.Meek+,R,NEDO-12154,46,1972) 20792 3 14 ANALYSIS Average cross section from activity and known 20792 3 15 140-La and 140-Ba fission yields and decay 20792 3 16 parameters. 20792 3 17 DECAY-DATA (57-LA-140,,DG) 20792 3 18 (56-BA-140,,DG) 20792 3 19 ERR-ANALYS (ERR-S) Statistical error 20792 3 20 HISTORY (19801112A) G.C. Data headings changed. 20792 3 21 (20211220U) SD: BIB updated. 20792 3 22 (20230202U) SD: ASSUMED and REL-REF added. 20792 3 23 ENDBIB 21 0 20792 3 24 NOCOMMON 0 0 20792 3 25 DATA 5 1 20792 3 26 EN-DUMMY DATA ERR-T ERR-S ASSUM 20792 3 27 MEV MB MB PER-CENT PC/FIS 20792 3 28 1.5 78.1 3.9 2. 7.91 20792 3 29 ENDDATA 3 0 20792 3 30 ENDSUBENT 29 0 20792 399999 ENDENTRY 3 0 2079299999999